2) The shape of the Zheng is rectangular, with one string and one sound. There were thirteen strings in the Tang and Song Dynasties. At first, it was more than 25 strings, and then it gradually increased to 16 strings, 18 strings and 21 strings. At present, the most commonly used is the 21-string.
3) Yes, the beauty of guzheng lies in its charm, simplicity, elegance, purity and elegance.